LLM Comparison

Claude Sonnet 4.6 vs GPT-5.4 Nano

Side-by-side specs, pricing & capabilities · Updated April 2026

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2/6 models

Same tier:

	Claude Sonnet 4.6	GPT-5.4 Nano
Organization	Anthropic	OpenAI
OpenTools Score	67 7.5
Family	Claude	GPT
Status	Current	Current
Release Date	Feb 2026	Mar 2026
Context Window	1.0M tokens	400K tokens
Input Price	$3.00/M tokens	$0.20/M tokens
Output Price	$15.00/M tokens	$1.25/M tokens
Pricing Notes	Cache read: $0.3000/M tokens	Cache read: $0.0200/M tokens
Capabilities	textvisioncodetool-use	textvisioncode
Max Output	128K tokens	128K tokens
API Identifier	`anthropic/claude-sonnet-4.6`	`openai/gpt-5.4-nano`
Benchmarks
MMLU	88	—
HumanEval	93.7	—
MATH	79.5	—
GPQA	68.9	—
	View Claude Sonnet 4.6	View GPT-5.4 Nano

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Input tokens / month

Output tokens / month

Model	Input	Output	Total / mo	vs Best
GPT-5.4 NanoCheapest	$0.20	$0.63	$0.83	—
Claude Sonnet 4.6	$3.00	$7.50	$10.50	+1173%

Anthropic

Claude Sonnet 4.6

Claude Sonnet 4.6 is a multimodal llm from Anthropic. Supports up to 1,000,000 token context window. Achieves 88.0% on MMLU. Available from $3.00/M input tokens.

OpenAI

GPT-5.4 Nano

GPT-5.4 Nano is a multimodal llm from OpenAI. Supports up to 400,000 token context window. Available from $0.20/M input tokens.